Main Switch Board | Ho Chi Minh City, Viet Nam

MSB are used in low-voltage networks and also is the most important component in the power distribution network. This type of electrical panels are installed in the electrical engineering room of the industrial buildings such as factory, Industrial Workshop, Commercial Centre, Office Buildings, Apartment Buildings, Hospitals, Schools, Ports, Airports … It is placed at the rear of LV Substation and the front of low-voltage distribution Boards (DB).

Main switchboard – assembled unit of electrotechnical components. It is used for receiving, measuring and distribution of electrical energy and protects the network from overload, short-circuit and current leak.

When main switchboard is equipped with energy meters, it is possible to measure and control energy consumption. Also this equipment automatically connects to back up power supply in case of emergency. Main switchboard usually consists of several cabinets mounted on the floor. On the doors of cabinets are installed signaling and control devices, which allow read the status about the operation of the equipment.

Thus, MSB is an important and responsible part of the electricity network. Taking into account industrial requirements and correctly choosing devices main switchboard helps to avoid power loss and downtimes in production. For immediate response to emergency situations it is recommended to equip main switchboard with remotely operated devices.

Panels, that are part of the main distribution boards

There are three main types of panels that that belongs to main switchboard:

• sectional panels;
• linear panels;
• incomer panels.

Sectional panel includes circuit breaker which provides power supply from one input to several sections. Sectional panels can be equipped with automatic source change over systems, which provide uninterrupted power supply and guarantee stability of all system.

Linear panels are used to distribute load between incoming lines.

In the incomer panels are mounted circuit breakers which are connected to transformers. Also incomer panels are equipped with energy meters for measuring energy consumption.

QUANGANHCONS

Substation budget estimate

Select the capacity, route lengths and package to view your indicative budget and electrical parameters.

01 Quick estimate

Substation type Capacity (kVA) Quotation packageIndicative pricing for the selected configuration, excluding VAT. Transformer Overhead MV route length (m)Enter only the overhead section of the route.

Cable and power-factor correction conditions

kVA utilisation before correction (%)Percentage of rated apparent power before correction. Cables and breakers are still selected at transformer rated capacity. Single-core LV cable Transformer-to-breaker installation Ambient temperature (°C)Underground: soil temperature. Above ground: air temperature. Target cosφ after correction cosφ before correctionKeep the suggested value if measured data is unavailable. Transformer impedance uk (%)Use the nameplate value when available.

Live-line connection, multiple transformers/MV feeders or special installation conditions

Request a project quotation

Send your project details, BOQ or drawings to request a formal quotation. Fields marked * are required.

Quotation package Contact name * Phone / Zalo * EmailOptional if you prefer a reply by phone. Company / investor Project location * Project name Transformer / total substation capacity (kVA) Substation type Number of transformers Utility supply voltage MV route type Overhead MV (m) Underground MV (m) Target schedule

BOQ / drawing / site-photo linkShare a Google Drive, OneDrive or document link. Please grant viewing access to the recipient. Project requirements

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Quotation scope

Applies to one EVN-supplied substation with oil-immersed transformers at 22/0.4 kV (single-phase: 12.7/0.23 kV), with MV metering VTs/CTs supplied by EVN. The estimate includes the selected equipment, installation, earthing, transformer-to-main-breaker connections, design and connection documentation, and coordination of testing and utility acceptance.

Kiosk, integrated steel-pole and indoor substations include MV switchgear and the entered underground cable route. Other outdoor arrangements use the relevant protection configuration. The final diagram must meet the project connection requirements.

Excludes VAT, cables from the substation switchboard to the MSB/loads, live-line work, harmonic reactors, weak-ground treatment or special piling, land and special fire-protection provisions. Underground routes assume normal construction conditions and exclude road drilling and special reinstatement.

Prices are indicative investment budgets. A formal quotation follows site assessment and agreement on the configuration. Electrical selections are preliminary and require design verification before installation.

Capacity range and application conditions

The catalogue defines the enquiry range of this tool, not universal TCVN capacity limits. Single pole-mounted transformers: 15–100 kVA; three-unit banks: 3×15–3×100 kVA. Platform substations: 100–630 kVA. Steel-pole substations: 100–630 kVA; 750/800 kVA require design verification and local approval. Ground-mounted, kiosk and indoor configurations: 50–10,000 kVA. Not every configuration has a package price or the same structural design.

Reference: EVN Decision 1299/QD-EVN dated 3 November 2017, Volume 1, sections 3.3–3.4. Check the current requirements of the responsible utility before implementation. Kiosks must meet manufacturer ratings and testing requirements (IEC 62271-202); indoor and ground-mounted arrangements must meet project layout, ventilation, structural and fire-protection requirements. For multiple transformers, specify the quantity and capacity of each unit.

Panels, that are part of the main distribution boards

Substation budget estimate

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